这个标志是什么意思？

253. 这个标志是什么意思？

单选题正确率: 88%

A. 前方路面不平 B. 前方路面下凹 C. 前方路面凸起 D. 前方路面湿滑

恭喜，答对了！ {{vm.result.explain}}

答案不正确！ {{vm.result.explain}}

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